After the retiring of the Patek Philippe Nautilus ref. 5726/1A with grey and white dial on bracelet, comes a new iteration of one of our favorite Nautilus watches.The Patek Philippe Nautilus was conceived using the universal shape of a porthole found on most maritime vessels and released just four years after the Audemars Piguet Royal Oak was launched in 1972. The Nautilus Annual Calendar with Moon Phase ref. 5726 is now available in stainless steel with a gorgeous blue dial very similar in hue to that of the Nautilus ref. 5711/1A. and on alligator strap with the black grey dial. The new blue dial is a true chameleon that changes in hue depending on lighting conditions —see pics below.